To install the base of the Plano BF flush baseboard profile, you can use adhesive to attach it directly to the wall. Otherwise, you can attach the base track of the profile to the first layer of drywall by screwing it to the studs. Make sure to drill the base profile in the center, on the lower part of the profile. Then, proceed with the installation of the second layer of drywall and finally interlock the finish profile of the baseboard onto the base track.